Boom of concrete pump truck and concrete pump truck

ABSTRACT

The present invention provides a boom of concrete pump truck, which has folded state and unfolded state, the boom comprises seven boom sections articulated in sequence, in the folded state, the seven boom sections are essentially arranged in five straight lines staggered to each other, and at least the last two boom sections are in the same straight line. Since the seven sections are essentially arranged in five straight lines staggered from each other, the overall dimensions of the boom sections can be reduced greatly, and the requirement for road conditions can be met easily. Moreover, in the folded state, at least the last two boom sections are in the same straight line; therefore, the flexibility and operability of the boom for material distribution can be greatly improved. The present invention further provides a concrete pump truck that comprises the boom described above.

TECHNICAL FIELD

The present invention relates to a transportation equipment of concreteor other building materials, in particular to a boom of concrete pumptruck and a concrete pump truck with the boom.

BACKGROUND OF THE INVENTION

A concrete transportation pump truck (abbreviated as “concrete pumptruck” or “pump truck”) is a concrete transportation apparatus which aconcrete pump and an articulated boom are mounted on an automobilechassis, a concrete delivery pipe is laid along the boom, and concreteis outputted through a terminal hose ultimately. The articulated boomhas folded state and unfolded state. In the folded state, the boom isfolded onto the chassis, so that the pump truck can run on the road. Inthe unfolded state, the boom is unfolded, so that concrete can be pouredover a long distance.

It is well-known that the folded forms of the boom mainly includeR-shaped, Z-shaped, and RZ-shaped folded forms. The R-shaped folded formrefers to that the boom sections can be folded in a coiled or rolled upmanner in a first direction (e.g., clockwise direction), and can beunfolded in a second direction being reversed to the first direction(e.g., counter-clockwise direction). The Z-shaped folded form refers tothat the boom sections can be folded or unfolded in reversed directionin turns. The RZ-shaped folded form is a combination of R-shaped andZ-shaped folded forms. More boom sections are required in order toobtain a longer concrete transportation distance. However, the pumptruck is inevitably subjected to restrictions of the road conditionswhen it runs on the road, for example, when the boom is in the foldedstate, the length, width, and height of the pump truck are subjected torestrictions of the road transportation rules. Therefore, it isimpossible to increase boom sections freely. At present, the number ofthe boom sections on a concrete pump truck is usually not more than 6.

In order to increase the concrete transportation distance, it isnecessary to increase the length of each boom section if the number ofsections is unchanged. However, in this case, the flexibility andoperability of the boom will be degraded, and on the other hand, thesectional dimensions of the boom sections have to be increasedaccordingly since the length of the boom sections have been increased;consequently, the overall size of the pump truck is increased to somedegree, and the pump truck will be restricted by road conditions.

For long, it has been a challenge in the art to ensure the pump truckmeeting the road transportation rules as the boom is in the foldedstate, and to increase the concrete transportation distance as far aspossible as the boom is in the unfolded state, while to improve theflexibility and operability of the boom.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a boom of concretepump truck, which can extend the concrete delivery range as far aspossible when it is in unfolded state and has high flexibility andoperability, but essentially doesn't increase the overall dimensions ofthe pump truck when it is in folded state.

To attain the object described above, the present invention provides aboom of concrete pump truck, which has a folded state and a unfoldedstate, and comprises seven boom sections articulated in sequence,wherein, in the folded state, the seven boom sections are essentiallyarranged in five straight lines staggered to each other, and at leastthe last two boom sections are in the same straight line.

Preferably, in the folded state, the fourth boom section to the seventhboom section are in two straight lines among the five straight lines.

Preferably, the fourth boom section and the fifth boom section are inone of the two straight lines, and the sixth boom section and seventhboom section are in the other one of the two straight lines.

Preferably, in the folded state, the first boom section and the secondboom section are in a first longitudinal plane, the fourth boom sectionto the seventh boom section are in a second longitudinal plane, thefirst longitudinal plane and the second longitudinal plane are parallelto each other and spaced from each other, and the third boom sectionextends between the first longitudinal plane and the second longitudinalplane.

Preferably, when the boom is folded, the first boom section to the thirdboom section are folded in a first direction, the fourth boom section isfolded onto the third boom section in a second direction that isreversed to the first direction, and the sixth boom section is foldedonto the fifth boom section in the first direction.

Preferably, the fifth boom section, the sixth boom section and theseventh boom section are in one of the two straight lines, while thefourth boom section is in the other one of the two straight linesseparately.

Preferably, in the folded state, the first boom section and the secondboom section are in a first longitudinal plane, the fourth boom sectionto the seventh section are in a second longitudinal plane, the firstlongitudinal plane and the second longitudinal plane are parallel toeach other and spaced from each other, and the third boom sectionextends between the first longitudinal plane and the second longitudinalplane.

Preferably, when the boom is folded, the first boom section to the thirdboom section are folded in a first direction, the fourth boom section isfolded onto the third boom section in a second direction that isreversed to the first direction, and the fifth boom section is foldedonto the fourth boom section in the first direction.

Preferably, in the folded state, the five straight lines are essentiallyparallel to each other.

In addition, the present invention further provides a concrete pumptruck, which comprises an automobile chassis, a revolving platform, anda boom, with the boom mounted on the automobile chassis via therevolving platform, wherein, the boom is the boom provided in thepresent invention.

With the technical scheme described above, a boom that has seven boomsections can be provided, and therefore the concrete delivery range canbe extended to some degree. In addition, in folded state, the seven boomsections are essentially arranged in five straight lines staggered fromeach other; therefore, the overall dimensions of the sections can bedecreased greatly, and the requirement for road conditions can be meteasily. Moreover, in folded state, at least the last two boom sectionsare in the same straight line; therefore, the flexibility andoperability of the boom for material distribution can be greatlyimproved.

Other characteristics and advantages of the present invention will befurther detailed in the embodiments hereunder.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are provided here to facilitate furtherunderstanding on the present invention, and are a part of this document.They are used together with the following embodiments to explain thepresent invention, but shall not be comprehended as constituting anylimitation to the present invention. Among the drawings:

FIG. 1( a) is a side view of the concrete pump truck according to anembodiment of the present invention.

FIG. 1( b) is a schematic diagram of the concrete pump truck shown inFIG. 1( a).

FIG. 2( a) is a side view of the concrete pump truck according toanother embodiment of the present invention.

FIG. 2( b) is a schematic diagram of the concrete pump truck shown inFIG. 2( a).

FIG. 3-FIG. 10 are schematic diagrams of the concrete pump trucksaccording to other embodiments of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Hereafter the embodiments of the present invention will be detailed,with reference to the accompanying drawings. It should be appreciatedthat the embodiments described here are only provided to describe andexplain the present invention, but shall not be deemed as constitutingany limitation to the present invention.

As shown in the figures, the concrete pump truck mainly comprises anautomobile chassis, a revolving platform, and a boom, wherein, the boomis mounted on the automobile chassis via the revolving platform 8, sothat the boom can revolve around the revolving platform 8 as required,and preferably can revolve 0°-360°.

The concrete pump truck provided in the present invention has seven boomsections articulated in sequence, i.e., there are the first boom sectionto the seventh boom section when counted from the first boom section 1connected to the revolving platform 8. Compared to the boom having fiveboom sections in the prior art, the boom having seven boom sections inthe present invention can increase the concrete transportation distanceto some degree.

In addition, as an importance aspect of the present invention, when theboom is in a folded state, the seven boom sections are essentiallyarranged in five straight lines staggered from each other; in otherwords, the seven boom sections form a “five-layer” structure when theyare folded, rather than a “seven-layer” structure in the conventionalmeaning (no matter the structure is a R-shaped structure or Z-shapedstructure); therefore, the overall dimensions of the boom sections,especially the height of the pump truck, can be reduced greatly, and therequirement for road conditions can be met easily.

Moreover, as another important aspect of the present invention, when theboom is in the folded state, at least the last two boom sections are ina same straight line; therefore, the flexibility and operability of theboom for material distribution can be greatly improved. The seven boomsections can be folded into a “five-layer” structure just becauseseveral sections are in the same straight line. When this feature iscombined with the features described above, a novel technical scheme(i.e., a novel boom) will be formed, which has greater progressivesignificance and higher market value than conventional booms.

In the above technical scheme, those skilled in the art can implementthe present invention in a variety of ways. For example, three boomsections can be arranged in a same straight line, so that the seven boomsections can be arranged in five straight lines; or, four boom sectionscan be arranged in pairs in two straight lines respectively, so that theseven boom sections can be arranged in five straight lines.Theoretically, the two or three boom sections arranged in the samestraight line can be any adjacent sections among the seven boomsections. However, as a preferred embodiment, the fourth boom section tothe seventh boom section (i.e., the last four boom sections) arearranged in two straight lines. Usually a terminal hose is connected tothe last boom section to transfer concrete to a specified working placeduring the work. Therefore, the flexibility and operability of the boomfor material distribution can be improved greatly by arranging the lastseveral sections in straight lines.

Hereafter two preferred embodiments of the present invention will bedetailed first, with reference to the accompanying drawings.

FIGS. 1( a) and 1(b) show an embodiment of the present invention. Asshown in the figures, among the seven boom sections of the boom, thefourth boom section 4 and the fifth boom section 5 are in the samestraight line, and the sixth boom section 6 and the seventh boom section7 are in the same straight line. The two straight lines are the last twostraight lines among the five straight lines of the boom in the presentinvention. In this way, the last four boom sections are arranged in twoadjacent straight lines, so that the overall dimensions of the pumptruck can be reduced, and the flexibility and operability of the boomfor material distribution can be greatly improved.

In addition, it can be seen from FIG. 1( a), when the boom is in thefolded state, the first boom section 1 and the second boom section 2 arein a first longitudinal plane, the fourth boom section 4 to the seventhboom section 7 are m a second longitudinal plane, the first longitudinalplane and the second longitudinal plane are parallel to each other andspaced from each other, and the third boom section 3 extends between thefirst longitudinal plane and the second longitudinal plane. That is tosay, in the width direction of the pump truck, the first longitudinalplane comprising the first boom section 1 and the second boom section 2and the second longitudinal plane comprising the fourth section 4 to theseventh boom section 7 are spaced from each other, and connected to eachother via the third boom section 3, i.e., the third boom section 3 isdesigned into a curved shape, so that one end of the third boom section3 is positioned in the first longitudinal plane and the other end of thethird boom section 3 is positioned in the second longitudinal plane.Through this arrangement, the height of the pump truck can be reduced,and the space in width direction above the chassis of the pump truck canbe fully utilized.

In addition, as a preferred boom folded pattern, as shown in thefigures, when the boom is folded, the first boom section 1 to the thirdsection 3 are folded in a first direction (clockwise direction as shownin FIG. 1( b)), the fourth boom section 4 is folded onto the third boomsection 3 in a second direction (counter clockwise direction) beingreversed to the first direction, and the sixth boom section 6 is foldedonto the fifth boom section 5 in the first direction. The boom can beunfolded in the reversed direction. Through the combined folded pattern,the space occupied by the boom in the folded state can be reducedeffectively; therefore, the overall dimensions of the pump truck intravel state can be reduced, and the requirement for road conditions canbe met easily.

FIGS. 2( a) and 2(b) show the second embodiment of the presentinvention. As shown in the figures, among the seven boom sections of theboom, the fifth boom section 5, the sixth boom section 6, and theseventh boom section 7 are in the same straight line, and the fourthboom section 4 is in the other adjacent straight line separately.Through this way, the last three boom sections are arranged in the samestraight line, so that the flexibility and operability of the boom canbe improved; in addition, in some cases that the space is limited, theconcrete can also be transported to a specified working placesuccessfully.

Moreover, similar to the first embodiment, the seven boom sections canbe arranged in two longitudinal planes in this embodiment, so as toreduce the height of the pump truck and fully utilize the space in widthdirection above the chassis of the pump truck. It will not be describedrepeatedly herein.

In addition, as a preferred boom folded pattern, as shown in thefigures, when the boom is folded, the first boom section 1 to the thirdsection 3 are folded in a first direction (clockwise direction as shownin FIG. 2( b)), the fourth boom section 4 is folded onto the thirdsection 3 in a second direction (counter clockwise direction as shown inFIG. 2( b) being reversed to the first direction, and the fifth boomsection 5 is folded onto the fourth boom section 4 in the firstdirection. Through the combined folded pattern, the space occupied bythe boom in the folded state can also be reduced effectively: therefore,the overall dimensions of the pump truck in travel state can be reduced,and the requirement for road conditions can be met easily.

Moreover, as an embodiment of the present invention, as shown in FIG. 1(a) and FIG. 2( a), the five straight lines formed by the seven boomsections are essentially parallel to each other. That is to say, whenthe boom sections are in the folded state, all of them are essentiallylevel; therefore, the structure is stable and easy to arrangerelatively.

In another aspect of the present invention, provides a concrete pumptruck mainly comprising an automobile chassis, a revolving platform, anda boom, wherein, the boom is mounted on the automobile chassis via therevolving platform 8, and the boom is the boom provided in the presentinvention.

Besides the above two embodiments, the present invention furtherprovides some other embodiments of the boom that comprises seven boomsections, as shown in FIGS. 3-10. Hereafter these embodiments will bedescribed.

As shown in FIG. 3, in the folded state, the sixth boom section 6 andthe seventh boom section 7 are arranged in a straight line; therefore,the flexibility and operability of the boom can be improved. Inaddition, when the boom is folded, the first boom section 1 to the thirdsection 3 are folded in an R-shaped pattern in clockwise direction asshown in FIG. 3, while the third boom section 3 to the sixth boomsection 6 are folded in a Z-shaped pattern.

As shown in FIG. 4, in the folded state, the sixth boom section 6 andthe seventh boom section 7 are arranged in a straight line. In addition,when the boom is folded, the first boom section 1 to the third section 3are folded in a Z-shaped pattern, while the third boom section 3 to thesixth boom section 6 are folded in a reversed Z-shaped pattern, i.e.,the folded direction of the third boom section 3 to the sixth boomsection 6 is reversed to the folded direction of the first boom section1 to the third boom section 3.

As shown in FIG. 5, when the boom is folded, the first boom section 1 tothe third section 3 are folded in a Z-shaped pattern, while the thirdboom section 3 to the seventh boom section 7 are folded in a reversedZ-shaped pattern, i.e., the folded direction of the third boom section 3to the seventh boom section 7 is reversed to the folded direction of thefirst boom section 1 to the third boom section 3.

As shown in FIG. 6, in the folded state, the sixth boom section 6 andthe seventh boom section 7 are arranged in a straight line. In addition,when the boom is folded, the first boom section 1 to the third boomsection 3 are folded in a R-shaped pattern in clockwise direction asshown in FIG. 6, while the third boom section 3 to the fifth boomsection 5 are folded in a reversed R-shaped pattern, i.e., folded incounter clockwise direction, and the sixth boom section 6 is folded tothe bottom of the fifth boom section 5 in clockwise direction. Moreover,in this embodiment, the fifth boom section 5, the sixth boom section 6,and the seventh boom section 7 are arranged in an inclined manner on thepump truck (higher at the front end and lower at the rear end in thefront-rear direction of the pump truck), so as to improve the spaceutilization above the chassis and reduce the overall dimensions of thepump truck.

As shown in FIG. 7, in the folded state, the sixth boom section 6 andthe seventh boom section 7 are arranged in a straight line. In addition,when the boom is folded, the first boom section 1 to the third boomsection 3 are folded in a Z-shaped pattern, while the second boomsection 2 to the sixth boom section 6 are folded in an R-shaped patternin counter clockwise direction as shown in FIG. 7. Moreover, in thisembodiment, the fifth boom section 5 is arranged in an inclined manneron the pump truck (lower at the front end and higher at the rear end inthe front-rear direction of the pump truck).

As shown in FIG. 8, when the boom is folded, the first boom section 1 tothe third boom section 3 are folded in a R-shaped pattern in clockwisedirection as shown in FIG. 8, while the third boom section 3 to thefifth boom section 5 are folded in a reversed R-shaped pattern, i.e.,folded in counter clockwise direction, and the fifth boom section 5 tothe seventh boom section 7 are folded in a R-shaped pattern in clockwisedirection.

As shown in FIG. 9, in the folded state, the sixth boom section 6 andthe seventh boom section 7 are arranged in a straight line. In addition,when the boom is folded, the first boom section 1 to the third boomsection 3 are folded in a R-shaped pattern in clockwise direction asshown in FIG. 9, while the boom sections 2-5 are folded in a Z-shapedpattern, and the sixth boom section 6 is folded to the bottom of thefifth boom section 5 in clockwise direction.

As shown in FIG. 10, in the folded state, the sixth boom section 6 andthe seventh boom section 7 are arranged in a straight line. In addition,when the boom is folded, the first boom section 1 to the third boomsection 3 are folded in a Z-shaped pattern, while the third boom section3 to the fifth boom section 5 are folded in a reversed Z-shaped pattern,and the sixth boom section 6 is folded to the bottom of the fifth boomsection 5 in clockwise direction.

While some preferred embodiments of the present invention are describedabove with reference to the accompanying drawings, the present inventionis not limited to the details in those embodiments. Those skilled in theart can make modifications and variations to the technical scheme of thepresent invention, without departing from the spirit of the presentinvention. However, all these modifications and variations shall bedeemed as falling into the protected domain of the present invention.

In addition, it should be appreciated that the technical featuresdescribed in the above embodiments can be combined in any appropriatemanner, provided that there is no conflict among the technical featuresin the combination. To avoid unnecessary iteration, such possiblecombinations will not be described here in the present invention.

Moreover, the different embodiments of the present invention can becombined freely as required, as long as the combinations don't deviatefrom the ideal and spirit of the present invention. However, suchcombinations shall also be deemed as falling into the scope disclosed inthe present invention.

1. A boom of concrete pump truck, which has a folded state and unfoldedstate, wherein, the boom comprises seven boom sections articulated insequence, in the folded state, the seven boom sections are essentiallyarranged in five straight lines staggered to each other, and at leastthe last two boom sections are in the same straight line.
 2. The boom ofconcrete pump truck according to claim 1, wherein, in the folded state,the fourth boom section to the seventh boom section are in two straightlines among the five straight lines.
 3. The boom of concrete pump truckaccording to claim 2, wherein, the fourth boom section and the fifthboom section are in one of the two straight lines, while the sixth boomsection and the seventh boom section are in the other one of the twostraight lines.
 4. The boom of concrete pump truck according to claim 3,wherein, in the folded state, the first boom section and the second boomsection are in a first longitudinal plane, the fourth boom section tothe seventh boom section are in a second longitudinal plane, the firstlongitudinal plane and the second longitudinal plane are parallel toeach other and spaced from each other, and the third boom sectionextends between the first longitudinal plane and the second longitudinalplane.
 5. The boom of concrete pump truck according to claim 4, wherein,when the boom is folded, the first boom section to the third boomsection are folded in a first direction, the fourth boom section isfolded onto the third boom section in a second direction that isreversed to the first direction, and the sixth boom section is foldedonto the fifth boom section in the first direction.
 6. The boom ofconcrete pump truck according to claim 2, wherein, the fifth boomsection, the sixth boom section and the seventh boom section are in oneof the two straight lines, while the fourth boom section is in the otherone of the two straight lines separately.
 7. The boom of concrete pumptruck according to claim 6, wherein, in the folded state, the first boomsection and the second boom section are in a first longitudinal plane,the fourth boom section to the seventh boom section are in a secondlongitudinal plane, the first longitudinal plane and the secondlongitudinal plane are parallel to each other and spaced from eachother, and the third boom section extends between the first longitudinalplane and the second longitudinal plane.
 8. The boom of concrete pumptruck according to claim 7, wherein, when the boom is folded, the firstboom section to the third section are folded in a first direction, thefourth boom section is folded onto the third boom section in a seconddirection that is reversed to the first boom direction, and the fifthboom section is folded onto the fourth boom section in the firstdirection.
 9. The boom of concrete pump truck according to claim 1,wherein, in the folded state, the five straight lines are essentiallyparallel to each other.
 10. A concrete pump truck, comprising anautomobile chassis, a revolving platform, and a boom, the boom ismounted on the automobile chassis via the revolving platform, wherein,the boom is the boom described in claim
 1. 11. A concrete pump truck,comprising an automobile chassis, a revolving platform, and a boom, theboom is mounted on the automobile chassis via the revolving platform,wherein, the boom is the boom described in claim
 2. 12. A concrete pumptruck, comprising an automobile chassis, a revolving platform, and aboom, the boom is mounted on the automobile chassis via the revolvingplatform, wherein, the boom is the boom described in claim
 3. 13. Aconcrete pump truck, comprising an automobile chassis, a revolvingplatform, and a boom, the boom is mounted on the automobile chassis viathe revolving platform, wherein, the boom is the boom described in claim4.
 14. A concrete pump truck, comprising an automobile chassis, arevolving platform, and a boom, the boom is mounted on the automobilechassis via the revolving platform, wherein, the boom is the boomdescribed in claim
 5. 15. A concrete pump truck, comprising anautomobile chassis, a revolving platform, and a boom, the boom ismounted on the automobile chassis via the revolving platform, wherein,the boom is the boom described in claim
 6. 16. A concrete pump truck,comprising an automobile chassis, a revolving platform, and a boom, theboom is mounted on the automobile chassis via the revolving platform,wherein, the boom is the boom described in claim
 7. 17. A concrete pumptruck, comprising an automobile chassis, a revolving platform, and aboom, the boom is mounted on the automobile chassis via the revolvingplatform, wherein, the boom is the boom described in claim
 8. 18. Aconcrete pump truck, comprising an automobile chassis, a revolvingplatform, and a boom, the boom is mounted on the automobile chassis viathe revolving platform, wherein, the boom is the boom described in claim9.